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S13 redtop rough idle/odd throttle response HELP PLEASE!!!

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Old Feb 1, 2010 | 04:33 PM
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Also i'd like to thank you guys again for trying to help me out, especially raptor727.
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Old Feb 1, 2010 | 05:08 PM
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have you checked for boost leaks? i was just re reading your original post. colder air is more dense than hot air which might be a cause for your car running better in the cold, but maybe im wrong. just a thought. where in st pete?
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Old Feb 1, 2010 | 05:22 PM
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Ya i've never found any boost leaks. The car is right off gandy before us19
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Old Feb 1, 2010 | 05:26 PM
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let me see what my schedules like and maybe i can take a drive down south
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Old Feb 4, 2010 | 11:53 AM
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Ok so today I went to work on the car a little, and after putting some gas in it because it ran out last time lol. To my surprise, it started right up and idled so smooth but kinda high. It would rev out perfect as long as I went slow on the throttle. If I stabbed it quick it would cut out completely until I let off the throttle. After it got to temperature, it started stumbling just a little. After running a little longer, it finally just died. Now the ecu is throwing MAF and knock sensor codes. Also it won't start at all now unless I unplug the maf, but when I plug it back in the engine dies.
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Old Feb 4, 2010 | 02:31 PM
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sounds like a bad maf
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Old Feb 4, 2010 | 03:00 PM
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Yeah definitely. This is the fourth damn maf I've had on this car lol. I have a WTB thread up now so hopefully someone can come through.
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Old Feb 5, 2010 | 09:37 AM
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Got rid of the bad sohc maf and replaced with an sr maf (thanks blue_eclipse93), also opened my ecu to find a lot of dirt, dust, and ANTS!!! (that's right....ants lol). After putting everything back together, engine is purring smoothly on every startup, idles fine, and makes it all the way to operating temp without a stutter......BUT......yes there is a but, i took it for a short drive around the block and it breaks up bad under boost/too much throttle. Replaced spark plugs because other ones were fouled. Plugs are gapped at .030, is that too close?? Could this be causing the breakup under load?
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Old Feb 5, 2010 | 11:30 AM
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Enjuku told me that .028 was what they set them to. If its breaking up under boost it sounds like 1 or more of ur coil packs are gone. Mine did the same thing when in boost but ran fine at idle.
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Old Feb 6, 2010 | 01:45 PM
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The idle half of the problem is definitely fixed. Starts right up and idles at a steady 850 revs and never stumbles, now I just gotta fix the breakup under load. It has to be ignition related, either coil packs or ignitor, but I'm leaning toward coil packs like Mohawk said. If anyone knows of someone selling a set, let me know. Thanks
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